155440568 has 8 divisors (see below), whose sum is σ = 291451080. Its totient is φ = 77720280.

The previous prime is 155440567. The next prime is 155440613. The reversal of 155440568 is 865044551.

It is a happy number.

155440568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155440567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9715028 + ... + 9715043.

It is an arithmetic number, because the mean of its divisors is an integer number (36431385).

Almost surely, 2^155440568 is an apocalyptic number.

It is an amenable number.

155440568 is a deficient number, since it is larger than the sum of its proper divisors (136010512).

155440568 is a wasteful number, since it uses less digits than its factorization.

155440568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19430077 (or 19430073 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 38.

The square root of 155440568 is about 12467.5806795063. The cubic root of 155440568 is about 537.6769987117.

The spelling of 155440568 in words is "one hundred fifty-five million, four hundred forty thousand, five hundred sixty-eight".